Quarter	US dollars
1999-03-31	321
1999-06-30	261
1999-09-30	231
1999-12-31	104
2000-03-31	333
2000-06-30	129
2000-09-30	106
2000-12-31	1171
2001-03-31	143
2001-06-30	130
2001-09-30	85
2001-12-31	77
2002-03-31	79
2002-06-30	94
2002-09-30	95
2002-12-31	99
2003-03-31	96
2003-06-30	102
2003-09-30	106
2003-12-31	114
2004-03-31	102
2004-06-30	110
2004-09-30	140
2004-12-31	144
2005-03-31	128
2005-06-30	112
2005-09-30	143
2005-12-31	132
2006-03-31	110
2006-06-30	149
2006-09-30	198
2006-12-31	135
2007-03-31	131
2007-06-30	139
2007-09-30	182
2007-12-31	149
2008-03-31	240
2008-06-30	152
2008-09-30	158
2008-12-31	119
2009-03-31	103
2009-06-30	124
2009-09-30	135
2009-12-31	81
2010-03-31	96
2010-06-30	109
2010-09-30	86
2010-12-31	91
2011-03-31	83
2011-06-30	63
2011-09-30	70
2011-12-31	37
2012-03-31	52
2012-06-30	64
2012-09-30	45
2012-12-31	48
2013-03-31	40
2013-06-30	32
2013-09-30	46
2013-12-31	40
2014-03-31	33
2014-06-30	25
2014-09-30	26
2014-12-31	27
2015-03-31	41
2015-06-30	34
2015-09-30	0
2015-12-31	0
2016-03-31	0
2016-06-30	0
2016-09-30	0
2016-12-31	0
2017-03-31	0
2017-06-30	0
2017-09-30	0
2017-12-31	0
2018-03-31	0
2018-06-30	0
2018-09-30	0
2018-12-31	0
2019-03-31	0
2019-06-30	0
2019-09-30	0
2019-12-31	0